Pump.



W. WINTBRHFF.

'APPLICATION FILED EAB.. 29, 1910.

Patented Aug. .20, mi2.

-Zlfibws es both sies. The'eiasic if desire, be secured bv means 0f amea ring positioned at the 'mi' cii'cumfnce said eistic ring and ailu-aad, Wheraby the metal rii" be gmi'ialjy' screve-fi into the e miicring :m pmiiy ino the waive-seat 'This -hifeafec' ring UNITE@ To allywhom may oon/Jem f Be itv known that Vffiiimm HOFF, a subject of theEmperiir o Gmmany.,

residing at 5l Kronpi'inzeiisti-sss, dorf, Germany, have invend seiwhich the olowingg'A is :i specification,

The ixf'entimi herein presented iezifes a pump provided wi'h suction au@ifslivefy "baile positioned @ne abm'e the @die ih@ upl per oi* largerdelivery mi comming with a corespondingy dimension@ ca nai tuie of areciprocating piston Such L; 'LA

through such opening.

' @ne of the objecs of Hm irv line the vaiveeas n? boh of wh ehxsnicrings mafie m" murali i@ @be c; hand,zv.iid on ie Qne. may be eariiy andv necessary, The cai beki fast in lie Wi securing imams oui permithoned. at the (rente-i of Such nimmer ibut he i" having become worn misimply uvned over:

tion is iihisrated, 35; Way of eg 1 in whichi l Willis. and 2 repi'sntwo my tionai views 0f thev pump, Ehe Swim-as bw mg zaken at righ anges'to am mi :'Z.

The upper or larger bah .fz @im Dusse :im new and useful Impfuvemens iiiPumps? a manner that the lnwer or smaifer Suc im 'bail may be cmivemn'yremovef by mimi l1 he Va'ive '.fo-is;

Giese. elas'iic seats, may be made of ass oi" the like, and fu-e mi:subject ,l and dm3 need not, :is hitiieiito be h a rubber coveiiig o?be inafe rg amies-viii* xi'iay.,

f 0i" rubber.

. L e `opening The tapez'ng 'ioi'iii one? pmt of tim pump ensfuleg iii@iva or vaiwsd o always corr-abi? ifiiaover the diamte of iin@ may be sochos/en' in reiaion pump Cylindre?, als o -i, ppal* ba from beccimingSeated surface of the pisfm, but to assume its correct posiihe apeuehereof.

upper of the pump cfmgiuced fo/mi of dmibe hood s; which' also Thisdou'fie himd;

u peredge of themetal ring oformsan a utmentffor ball a therebypreventing the ball from being pressed too firmly into the yielding ringla. .The elasticl seating ring for the suction valve or ball d may ofcourse be constructed in lthe same or a similar manner.

As shown in Fig. L the elastic ring L which acts as a Seatfortlie-suction ball may attached to the valve seat in the followingmanner. .Arranged in the valve seat and around the clasticriiig are oneor several annular lair passages p' communicating through a passage l]provided in the wall of the suction end of the pump with the suc tionchamber fr. During the working of the pump a vacuum is produced in thespace I and consequently also in the passage or passages p whereby theelastic ring is firmly held to its seat.

The piston pump according to this invention is particularly adapted forthick fluids such as., paper pulp and the like, as

the balls or valves being of metal will always seat tightly on theyielding or elastic seating rings, evenin the event. of long fibers orthe like entering between the ball and the seating ring. 'A furtheradvantage of this pump, which renders it particularly adapted for theconveyance of paper pulp and the like consists in theA fact that thematerial operated upon is caused to move in a practically straightcourse from the suction end to the outer end, whereby Sudden deviationsin directions of the flowing substances are avoided. Owing to theball-sliaped form of the valves, the fiuid subsi'ance flows 'simply in atangential direction past the balls and consequently is notahruptlyldeviated at points around the valves, whereby whirling andsimilaractions/are avoided.

The possibility of easily exchanging the valves and the elastic seatingrings is more-"if" over of importance, particularly Where the pump is tobe used/for substances of different consistency and color. This ummoreover is v,conveniently applicab e or the evacuation of the suctionrollers in paper making machines. In order to enable any liquid. thatmay be present in the pump prior to the removal of the valves andseating rings to be drainedof, a screw s is introduced from the outsideinto the suction end of the pump, so as to enable the suction valve d tobe displaced and liftedof its seat in order to `free'the passage for theliquid to the suction conduit.

What I claim and desire to secure by Letters Iatent. is:

. 1. Y pump comprising a Casin a reciprocating piston therein providedima central opening, having a grooved wall, an elastic ring positionedin said opening and having a rib engaging said groove and a yrigidthreaded ring within said opening for assisting in holding said elasticring in place.

2. In a pump of the kind described a re-.

ciprocatory'piston provided with a central opening,

having a grooved wall, an elastic seating ring adapted to tit in saidopening and provided with a rib engaging 'said groove, and means forallowing the suction action of the pump to assist in main tainingsaid'ring in correct position in the opening, substantially as setforth.

In testimony whereof I aiiix my signature in the presence of twowitnesses.

WILHELM WINTERHOFF. Witnesses:

Bassin F. DUNLAP, LOUIS VANDORY.

